RE: Paramount 52/70
Since I am planing on trying 3d I used high torque servos in mine. I strongly recommend that you modify the servo loaction as salty25 describes.
In my case I built a tray for the throttle servo close to wood piece in the middle of the openneing at the fuselage. I placed the elevator servo where the throttle was supposed to be. I used the gaps where the elevator and rudder servos had to be located to put in the center of it the rudder servo. You will have to raise the rudder servo to avoid overlaping of the pull/pull cables with the elevator's arm, also you will have to cut some wood to allow the cables to move freely.